ChatGPT offers a permanent Free plan anyone can use without time limits....

https://jaspersmasterinsights.opalvector.com/posts/how-do-i-activate-a-chatgpt-free-trial-in-the-mobile-app-if-i-m-eligible

ChatGPT offers a permanent Free plan anyone can use without time limits. Sometimes, targeted users get free trials for the Plus plan, which may require a payment card and auto-renew when the trial ends